公开(公告)号：US06995948B2

公开(公告)日：2006-02-07

申请号：US10617560

申请日：2003-07-11

申请人： Masatoshi Nakayama

发明人： Masatoshi Nakayama

IPC分类号： G11B5/255

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  C23C16/26 ,  C23C16/30 ,  G11B5/102 ,  G11B5/255 ,  G11B5/3106 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996 ,  Y10T29/49021

摘要： A magnetoresistive thin-film magnetic head with high corrosion resistance for recording medium having massive capacity is provided by providing a protective film having a thickness of 40 Å or less. Since the distance between the head and the medium is remarkably reduced, the film is suitable for a recording medium having high-packing density. The magnetoresistive type thin-film magnetic head is provided, wherein the following layers are formed on at least the surface of the head facing a recording medium: (A) a lower layer composed of a thin film having the composition represented by the formula selected from the group consisting of: formula (i): SiCXHYOZNWFTBUPV (where X=0.5–26, Y=0.5–13, Z=0–6, W=0–6, T=0–6, U=0–1 and V=0–1, in terms of atomic ratio), and formula (ii): SiHYOZNWFTBUPV (where Y=0.0001–0.7, Z=0–6, W=0–6, T=0–6, U=0–1 and V=0–1); and (B) an upper layer composed of a diamond-like thin film having the composition represented by the following formula: CHaObNcFdBePf (where a=0–0.7, b=0–1, c=0–1, d=0–1, e=0–1 and f=0–1), and the total thickness of the lower layer and the upper layer is 40 Å or less. Also provided are a method for producing the same, and a magnetic head device using the same.

摘要翻译： 通过提供厚度为40埃以下的保护膜，提供具有大容量记录介质的具有高耐腐蚀性的磁阻薄膜磁头。 由于头和介质之间的距离显着降低，所以该膜适用于具有高堆积密度的记录介质。 提供了磁阻型薄膜磁头，其中在面向记录介质的头部的至少表面上形成以下层：（A）由具有由下式表示的组成的薄膜组成的下层： 该组组成

公开(公告)号：US06566945B2

公开(公告)日：2003-05-20

申请号：US10030102

申请日：2002-01-17

申请人： Masatoshi Nakayama ,  Kenichi Horiguchi ,  Yuji Sakai ,  Yukio Ikeda ,  Kazuyuki Totani ,  Satoshi Kunugi ,  Haruyasu Senda

发明人： Masatoshi Nakayama ,  Kenichi Horiguchi ,  Yuji Sakai ,  Yukio Ikeda ,  Kazuyuki Totani ,  Satoshi Kunugi ,  Haruyasu Senda

IPC分类号： H03F366

CPC分类号： H03F1/3235 ,  H03F2201/3212 ,  H03F2201/3218

摘要： A feedforward amplifier combines an input signal combined by a first error rejection loop with an error component and a first pilot signal detected by a second error detection loop, thereby canceling out the error component and the first pilot signal residual in the input signal.

公开(公告)号：US06471832B1

公开(公告)日：2002-10-29

申请号：US08641855

申请日：1996-05-02

申请人： Masatoshi Nakayama ,  Masahiro Nakano ,  Tsukimi Endo

发明人： Masatoshi Nakayama ,  Masahiro Nakano ,  Tsukimi Endo

IPC分类号： C23C1434

CPC分类号： B41J2/345

摘要： A method of producing a wear-resistant protective film for a thermal head comprises depositing a wear-resistant protective film by sputtering on a thermal head which includes a substrate, and a heat-developing layer and a pair of electrodes formed on either the substrate or a heat-regenerative layer formed thereon. A layer of the wear resistant protective film is formed under a RF larger bias and another layer without a bias or with a smaller bias. Good step coverage is obtained by the RF sputter layer of the wear-resistant and the protective film prevents the intrusion of water that can cause cracking, and the layer formed under no or smaller bias reduces internal stresses and inhibits the development of cracks due to internal stresses as well as the cracking by RF sputtering.

摘要翻译： 制造用于热敏头的耐磨保护膜的方法包括通过溅射将耐磨保护膜沉积在包括基底的热敏头上，以及形成在基底上的热显影层和一对电极 形成在其上的热再生层。 在RF较大的偏压下形成耐磨保护膜层，而在没有偏压或较小偏压的情况下形成另一层。 耐磨层的RF溅射层获得良好的阶梯覆盖，保护膜防止可能引起裂纹的水侵入，而在没有或较小偏置的条件下形成的层会降低内部应力，并抑制内部产生裂缝的发展 应力以及RF溅射的裂纹。

公开(公告)号：US06456160B1

公开(公告)日：2002-09-24

申请号：US09840181

申请日：2001-04-24

申请人： Masatoshi Nakayama ,  Kenichi Horiguchi ,  Yuji Sakai ,  Yukio Ikeda ,  Junichi Nagano ,  Haruyasu Senda

发明人： Masatoshi Nakayama ,  Kenichi Horiguchi ,  Yuji Sakai ,  Yukio Ikeda ,  Junichi Nagano ,  Haruyasu Senda

IPC分类号： H03F366

CPC分类号： H03F1/3229

摘要： A feedforward amplifier combines an input signal delayed by a delay circuit with an output signal by a combiner; down-converts the output of the combiner to a low frequency by a frequency converter; extracts a distortion component from the output of the frequency converter; measures the distortion component by a power detector; and controls a second vector regulator of a distortion canceling loop by a controller such that the distortion component measured becomes minimum.

摘要翻译： 前馈放大器将由延迟电路延迟的输入信号与组合器的输出信号进行组合; 通过变频器将组合器的输出下变频为低频; 从变频器的输出中提取失真分量; 通过功率检测器测量失真分量; 并且通过控制器控制失真消除环路的第二矢量调节器，使得测量的失真分量变得最小。

公开(公告)号：US6133791A

公开(公告)日：2000-10-17

申请号：US177651

申请日：1998-10-23

申请人： Kenichi Horiguchi ,  Masatoshi Nakayama ,  Yukio Ikeda ,  Tadashi Takagi ,  Haruyasu Senda

发明人： Kenichi Horiguchi ,  Masatoshi Nakayama ,  Yukio Ikeda ,  Tadashi Takagi ,  Haruyasu Senda

IPC分类号： H03F1/32 ,  H03F1/00

CPC分类号： H03F1/3229

摘要： A feedforward amplifier which includes a distortion detector, a distortion eliminator, an error power extractor, a first level detector and a first controller. The error power extractor extracts output error power due to variations in the distortion eliminator by combining the output signal from the distortion eliminator with the signal from a first linear signal path in the distortion detector in opposite phases. The first level detector detects the output error power extracted by the error power extractor, and the first controller controls a first variable attenuator and a first phase shifter which are interposed in the distortion eliminator such that the output error power is maintained at zero. This can solve a problem of a conventional feedforward amplifier in that the power level of the pilot signal must be increased to heighten the detection sensitivity of the pilot signal because the detection level of the pilot signal becomes minimum at an optimum operation point, and that the increasing power of the pilot signal degrades the communication quality of a system employing the conventional feedforward amplifier.

摘要翻译： 一种前馈放大器，包括失真检测器，失真消除器，误差功率提取器，第一电平检测器和第一控制器。 误差功率提取器通过将来自失真消除器的输出信号与来自失真检测器中的第一线性信号路径的信号相反地组合，由于失真消除器的变化而提取输出误差功率。 第一电平检测器检测由误差电力提取器提取的输出误差功率，并且第一控制器控制插入失真消除器中的第一可变衰减器和第一移相器，使得输出误差功率保持为零。 这可以解决常规前馈放大器的问题，因为导频信号的检测电平在最佳操作点变为最小时必须提高导频信号的功率电平，以提高导频信号的检测灵敏度， 导频信号的增加功率降低了采用常规前馈放大器的系统的通信质量。

公开(公告)号：US20150035066A1

公开(公告)日：2015-02-05

申请号：US14378219

申请日：2012-04-27

申请人： Hiroshi Otsuka ,  Toshiyuki Oishi ,  Eigo Kuwata ,  Takashi Yamasaki ,  Makoto Kimura ,  Masatoshi Nakayama

发明人： Hiroshi Otsuka ,  Toshiyuki Oishi ,  Eigo Kuwata ,  Takashi Yamasaki ,  Makoto Kimura ,  Masatoshi Nakayama

IPC分类号： H01L27/088 ,  H01L23/66

CPC分类号： H01L27/088 ,  H01L23/66 ,  H01L27/0207 ,  H01L27/0605 ,  H01L27/0629 ,  H01L27/0727 ,  H01L29/0642 ,  H01L29/0692 ,  H01L29/2003 ,  H01L29/7786 ,  H01L2223/6611 ,  H01L2924/0002 ,  H03F3/195 ,  H01L2924/00

摘要： An FET chip is configured to include an oscillation suppression circuit that has a gate capacitance C formed between a gate electrode 5c and two-dimensional electron gas, and a channel resistance R between the gate electrode 5c and a source electrode 7c, and therefore the oscillation suppression circuit is loaded by only an FET process to make an MMIC design unnecessary, so that it is possible to attain stabilization of an FET while suppressing increase in cost, and to suppress oscillation.

摘要翻译： FET芯片被配置为包括在栅极电极5c和二维电子气体之间形成栅极电容C的振荡抑制电路以及栅极电极5c和源极电极7c之间的沟道电阻R，因此振荡 抑制电路仅通过FET工艺加载，从而不需要MMIC设计，从而可以在抑制成本增加并抑制振荡的同时实现FET的稳定化。

公开(公告)号：US20100033241A1

公开(公告)日：2010-02-11

申请号：US12514159

申请日：2006-11-30

申请人： Kazutomi Mori ,  Kazuhiro Iyomasa ,  Akira Ohta ,  Teruyuki Shimura ,  Masatoshi Nakayama

发明人： Kazutomi Mori ,  Kazuhiro Iyomasa ,  Akira Ohta ,  Teruyuki Shimura ,  Masatoshi Nakayama

IPC分类号： H03F3/68 ,  H03F3/189

CPC分类号： H03F1/0277 ,  H03F1/565 ,  H03F3/191 ,  H03F3/211 ,  H03F3/72 ,  H03F2200/318 ,  H03F2200/366 ,  H03F2200/387 ,  H03F2200/451 ,  H03F2200/456 ,  H03F2203/7233 ,  H03F2203/7236 ,  H03H7/38

摘要： Provided is a high frequency amplifier including two amplifying elements of different element sizes connected in parallel and switching the amplifying elements in accordance with a level of output power. In particular, the high frequency amplifier includes an output matching circuit for matching to characteristic impedance (50 ohms) both when the output power is high and low, and increasing impedance when the turned-off amplifying element is viewed from a connection node on an output side of the two amplifying elements. Consequently, characteristics such as high output power and high efficiency can be achieved and it is possible to prevent an amplified high frequency signal from passing around to a matching circuit on a turned-off amplifying element side.

摘要翻译： 提供了包括并联连接的不同元件尺寸的两个放大元件的高频放大器，并且根据输出功率的电平来切换放大元件。 特别地，高频放大器包括输出匹配电路，用于在输出功率高和低时匹配特性阻抗（50欧姆），并且当输出端上的连接节点观察关断放大元件时增加阻抗 一侧的两个放大元件。 因此，可以实现诸如高输出功率和高效率的特性，并且可以防止放大的高频信号在关闭放大元件侧通过到匹配电路。

公开(公告)号：US20070241815A1

公开(公告)日：2007-10-18

申请号：US11660136

申请日：2004-10-28

申请人： Hifumi Noto ,  Kazuhide Yamauchi ,  Yoshihiro Hamamatsu ,  Tomokazu Hamada ,  Masatoshi Nakayama

发明人： Hifumi Noto ,  Kazuhide Yamauchi ,  Yoshihiro Hamamatsu ,  Tomokazu Hamada ,  Masatoshi Nakayama

IPC分类号： H03F1/30

CPC分类号： H03F1/3276 ,  H03F1/3223 ,  H03F2200/468

摘要： A linearizer changes a gain characteristic to a valley characteristic in which a gain reduces and then increases. The linearizer includes: a signal path in which an RF signal input terminal (1), an input side bias blocking capacitor (4), a diode pair (8, 12) including diodes having opposite polarities to each other, an output side bias blocking capacitor (5), and an RF signal output terminal (2) in series in the stated order; a bias circuit in which a resistor is provided between and a signal path formed between the input side bias blocking capacitor (4) and the diode pair (8, 12) and a bias terminal (3); an RF short-circuiting capacitor (6) whose one end is connected with the bias circuit between the bias terminal (3) and the resistor (7) and whose other end is grounded; and a DC feed inductor (11) whose one end is connected with the signal path between the diode pair (8, 12) and the output side bias blocking capacitor (5) and whose other end is grounded.

摘要翻译： 线性化器将增益特性改变为增益减小然后增加的谷特性。 线性化装置包括：信号路径，其中RF信号输入端（1），输入侧偏置阻塞电容（4），二极管对（8,12）包括彼此极性相反的二极管，输出侧偏压 电容器（5）和RF信号输出端子（2）按照所述顺序串联; 偏置电路，其中设置电阻器和形成在输入侧偏置阻断电容器（4）和二极管对（8,12）之间的信号路径和偏置端子（3）; RF短路电容器（6），其一端与偏置端子（3）和电阻器（7）之间的偏置电路连接，另一端接地; 和一个直流馈电电感（11），其一端与二极管对（8,12）和输出侧偏压电容（5）之间的信号通路连接，另一端接地。

公开(公告)号：US07283326B2

公开(公告)日：2007-10-16

申请号：US10867742

申请日：2004-06-16

申请人： Masatoshi Nakayama

发明人： Masatoshi Nakayama

IPC分类号： G11B5/40 ,  G11B5/39

CPC分类号： G11B5/187 ,  G11B5/127 ,  Y10T428/1164

摘要： A method of producing a protective film on recording media including forming a protective film on at least the surface facing a recording medium, said protective film having the composition represented by the formula: SiCXHYOZNW, where X=3-26, Y=0.5-13, Z=0.5-6 and W=0-6, in terms of atomic ratio, having a film thickness of 1-3 nm and having a refractive index of 2.0 or more.

摘要翻译： 一种在包括在至少面向记录介质的表面上形成保护膜的记录介质上制备保护膜的方法，所述保护膜具有由下式表示的组成：SiC Y 其中X = 3-26，Y = 0.5-13，Z = 0.5-6和W = 0-6，换句话说，是N 的原子比，膜厚为1-3nm，折射率为2.0以上。

公开(公告)号：US20070227302A1

公开(公告)日：2007-10-04

申请号：US11727482

申请日：2007-03-27

申请人： Takayuki Yoshida ,  Masatoshi Nakayama ,  Ryota Igarashi

发明人： Takayuki Yoshida ,  Masatoshi Nakayama ,  Ryota Igarashi

IPC分类号： B22F9/18

CPC分类号： H01F1/065 ,  G11B5/70615 ,  G11B5/70621 ,  G11B5/714 ,  H01F1/0054 ,  H01F1/061 ,  H01F1/09 ,  Y10T428/2991

摘要： A metal magnetic powder for a magnetic recording medium is provided whose particles have a metal magnetic phase, composed mainly of Fe or Fe plus Co, and an oxide layer, wherein the average major axis length of the powder particles is 10-50 nm, the average particle volume including the oxide layer is 5,000 nm3 or less, the atomic ratio (R+Al+Si)/(Fe+Co) calculated using the content values (at. %) of the elements contained in the powder particles is 20% or less, where R is rare earth element (Y being treated as a rare earth element). The metal magnetic powder is obtained by using a complexing agent and a reducing agent to elute nonmagnetic constituents after firing. The metal magnetic powder exhibits a large saturation magnetization σs for its particle volume while maintaining weatherability comparable to the conventional level and is suitable for a coated-type magnetic recording medium.

摘要翻译： 提供一种用于磁记录介质的金属磁粉，其颗粒具有主要由Fe或Fe + Co组成的金属磁性相和氧化物层，其中粉末颗粒的平均长轴长度为10-50nm， 包括氧化物层的平均粒子体积为5000nm 3以下，使用元素的含量值（at。％）计算的原子比（R + Al + Si）/（Fe + Co） 粉末颗粒中的含量为20％以下，其中R为稀土元素（Y为稀土元素处理）。 通过使用络合剂和还原剂在烧制后洗脱非磁性成分得到金属磁性粉末。 金属磁性粉末对于其颗粒体积显示出大的饱和磁化强度，同时保持与常规水平相当的耐候性，并且适用于涂覆型磁记录介质。